Question

How can I detect NULL within Active X

Asked by: jflanner

Hello Folks:

I am (via DTS) copying a table from an ODBC Source (Notes yuc) into SQL.  My SQL based destination table has several columns of numeric data with the "NOT NULL" constraint on.  My probelm is, the source is not so constrained.  My goal, when a NULL value is encountered, is to replace it with 0.  To that end, I have written the below transform.  I always get an "object required" error, or a type mismatch.  (I have tried many permutations with IS NULL, = NULL, ISNULL, etc.)  The fundamental question I have for you all:  How can I tell that s DTS Source Value is NULL?  It is probably simple, but I am missing it.


'**********************************************************************
'  Visual Basic Transformation Script
'************************************************************************

'  Copy each source column to the destination column
Function Main()
      DTSDestination("ReforcastDecemberIT") = SourceOr0("rD998")
      DTSDestination("ReforcastNovemberIT") = SourceOr0("rN998")
    ' many more instructions.  You get the idea.
      DTSDestination("EstimateMarchContractors") = SourceOr0("M997")
      DTSDestination("EstimateFebruaryContractors") = SourceOr0("F997")
      DTSDestination("EstimateJanuaryContractors") = SourceOr0("J997")
      Main = DTSTransformStat_OK
End Function


Function SourceOr0(SourceColumn)
      if DTSSource(SourceColumn) = NULL then
         SourceOr0 = 0
      else
         SourceOr0 = DTSSource(SourceColumn)
      endif
      
end Function

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Asked On
2003-12-17 at 10:58:11ID20828572
Tags

dts

,

dtssource

,

null

Topics

MS SQL Server

,

Microsoft Programming

,

ActiveX

Participating Experts
4
Points
500
Comments
6

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Answers

 

by: jonleehackerPosted on 2003-12-17 at 11:29:18ID: 9958953

you said you tried ISNULL but was it in this format:

        if IsNull(DTSSource(SourceColumn)) then

 

by: shivsaPosted on 2003-12-17 at 11:30:48ID: 9958962

try
IsNull(DTSSource(SourceColumn)

 

by: shivsaPosted on 2003-12-17 at 11:59:55ID: 9959166

ops  seconds late.

 

by: _TAD_Posted on 2003-12-17 at 12:35:35ID: 9959462



Hopefully the suggestions above will help you, but if this is VB and you are referencing database types you will need to use the dbNull object.

either this:

if (DTSSource(SourceColumn) = dbNull) then


Or this:

if (DTSSource(SourceColumn) == dbNull) then



 I can't remember which

 

by: _TAD_Posted on 2003-12-17 at 13:00:37ID: 9959635



Another option might be to use the keyword nothing

if (DTSSource(SourceColumn) == nothing) then


But I believe that "nothing" is reserved for the state of an object, not the value of a field...


 

by: arbertPosted on 2003-12-17 at 14:49:03ID: 9960419

Like was already stated above ISNULL() is the correct function for DTS, ActiveX script in DTS doesn't have the same constants that VB does....

20120131-EE-VQP-002

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